Automatic stoker.



W. T. HANNA.

AUTOMATIC STOKER.

APPLICATION I 'ILBD JULY 6,1909.

Patented Apr. 25, 1911;

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AUTOMATIC STOKER.

APPLICATION FILED JULY 6,1909,

Patented Apr. 25, 1911.

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fim 'ne y W. T. HANNA.

AUTOMATIC STOKER.

APPLICATION FILED JULY 6,1909

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W. T. HANNA.

AUTOMATIC STOKER. AfPLIOATION FILED JULY 6,1909.

Patented Apr. 25, 1911.

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WILLIAM '1, HANNA, OF CINCINNATI, OH IO, ASSIGNOR 0F TWO-THIRDS TO THAA. HANNA AND ONE-THIRD T0 CLYDE P. JOHNSON, BOTH OF CINCINNATI, OHIO.

AUTOMATIC STOKER.

Specification of Letters Patent.

Application filed July 6, 1909.

Patented Apr. 25, 1911.

Serial No. 505,958.

To all whom 'it may concern:

- Be it known that 1, WILLIAM T. HANNA,

a citizen of the United States, residing atv automatic stoking mechanismso constructed as to permit of practically instantaneousremoval of allparts of the stoking mechanism which would interfere with hand stoking,

and the invention consists in the parts and combination and arrangementof parts hereinafter described and claimed.

1 have illustrated the invention in connection with fuel feedingmechanism substantially like that disclosed in my application forLetters Patent, filed May 16, 1907, Serial No. 373,908.

In the drawings, Figure l is a vertical central longitudinal sectionshowing stoking mechanism'embodying my invention as applied to the firebox of a locomotive; Fig. 2 a side elevation showing the hopper and feedscrew disconnected; Fig. 3 a side elevation of the stoking mechanismshowing the fire door open and the hopper and feed screw broken away;Fig. 4 a side elevation of one of the conduit sections; Fig.5 a frontelevation showing the partswhich remain when the stoking apparatus iscleared away for hand stoking; Fig. 6 a detail showing part of theconnections by which the direction of feed is controlled; Fig. 7 a frontView of the upper conduit section showing it connected to the fuel door;Fig. 8 a diagrammatic view showing the connections between the engine Iand the shaft which drives the fuel conveyer; and Figs. 9 and 10details.

The reference numeral 1 designates the front of the fire boxof alocomotive engine, 2 a base frame for the stoking mechanism in which ismounted an engine 3 arranged to drive a shaft 4. carrying a gear 5, 6 aframe detachably mounted on frame 2 carrying a hopper 7 and, beneath thehopper, a screw conveyer 8 adapted to be driven by a gear 9, fixed tothe conveyer shaft 10 and meshing with gear 5, and adapted to rotate ina casing formed in part by an oval chamber 11 in the base frame 2 and inpart by a semicylindrical wali 12 constituting part of the wall of thehopper, 13 an approximately cylindrical conduit section, preferablyintegral with the hopper, adapted to receive fuel from the delivery endof the conveyer screw and deliver it to an elbow shaped conduit section14 removably seated thereon and adapted to deliver the fuel to a feedchute 15 carried by a fuel door 16, 17 keys adapted to take into sockets18 in the door and lock the conduit section 14 in alined engagement withthe feed chute, 19 a plate or lid hinged to the upper part of the doorand adapted to close the feed chute when the stoking apparatus isdisconnected, 20 a hinged plate forming part of the upper wall ofconduit section 14: and, when open permitting inspection of the interiorof the fire box, 21 a threaded pin pivotally connected with the body ofthe conduit section 14, and adapted to take into a U-shaped lug 22 onthe view plate 20, and 23 a thumb nut adapted to lock the pin inengagement with lug 22 thereby holding the view.plate in its closedposition.

The base frame 2 is provided with abutments 25, adapted to center thehopper, and with pivoted clamps, or hooks, 26 adapted to take over pinsor lugs 27 upon the base of the hopper and lock the hopper in position.The rear side of the hooks are preferably cut away at 28 toreceive-detents 29 pivoted to the base frame and adapted to lock thehooks against accidental displacement.

In the preferred form the stoking apparatus includes power operatedmechanism, carried bythe fuel door, for directing the flow of the fuelas it leaves the feed chute. For this purpose I provide a feed plate 30,fixed tothe fuel door, preferably inclining downwardly from itsreceiving to its discharge end, and having its side faces slopingdownwardly from its longitudinal central line. Guide plates or wings 31,extending longitudinally of the feed plate are fixed at their rear endsto rods 82, having a jointed con nection with rock shafts 33, whereby acontinuous upward and downward swing, upon the faces of the feed platemay be imparted to either or both guide wings.

The rock 25 55 having its hearings in links 50.

shafts are actuated by arms 34, pivoted at 35 and provided with pins '36taking into slots or channels 37 in blocks 39 fixed to 3 arms 38 and 38which are adapted to be re- 5 'ciprocated by suitable connections .(not

shown) the slots being arranged transversely of the arms.

A preferred method of connecting the en? gine' with the driving shaft'4is shown in Fig. 8 in which 41 designates a sector arm pivotally securedto the cross head 40' of the engine. This arm is fixed to a shaft 42 andcarries at its free end a segmental 'rack 43 fixed to a shaft 46. Asleeve 47,

fixed on shaft 46, carries a crank 48 which is connected by a pivotshaft 49 with links 50 which are pivotally connected at their other endswith a crank 51 carried by a sleeve 52 loosely mounted on' shaft 42.,These links and their connections will be mounted thereon and shaft 42 asecond sleeve 52, fixed thereto. These sleeves are connected by crank48", links 50 and crank 51*. These links and their connections will bedesignated as frame B. An adjustable spring arm 53' is mounted on pivotshaft 49 and carries a sector arm 54 connected with a pallet 57*,adapted to engage with a toothed wheel 56 fixed'to shaft 4, thesepartsbeing duplicates in form and arrangement of the 40 corresponding partsdescribed in connection with frame A. Movement of the cross head to theright causes arm 41 to'rock shaft 42 from left to right, and throughracks 43 and 45 to rock sha 46 from right to left. This movement ofshaft 42, through fixed sleeve 52 and crank 51*, causes frame 13' tomove from left'to right and pallet 57 engaging with a tooth in wheel 55im arts rotation to the wheel and consequent y to shaft 4,

the rotation being from left-to right. At

the same time the rocking motion of shaft 46,through fixed sleeve 47 andcrank 48 causes frame A to move from right to left, pallet 57 ridingidly. Reversal of movement of the cross head causes the frames to movein reverse directions and pallet 57 then engages with toothed wheel 55and imparts rotation to it and shaft 4, the direction of rotation beingstill from left to right. By

changing the positions of the sector arms 54, 54 t pallets may be sopositioned that then other' ends will engage with the toothed wheels andthe direction of rotation ofpshaft 4 thereby reversed, or the palletsmay be positioned that both will be idle.

To clear the locomotive for hand stoking the arms 34, which actuate therock shafts, are-lifted out of engagement with the reciprocating arms38, the keys 17 turned to disengaging position, the conduit section 14removed, the detents 29 disengaged from the hooks 26, the hooksdisengaged from pins 27 and the frame carryingthe feed screw and hopperremoved, all of which may be done in a fraction of a minute.

By turning down the lid 19 the feed chute in the door may be closed sothat the door may completely close the fuel opening.

If when the stoking apparatus is in use it should at any time becomedesirable torake the fuel, the arms 34 may be lifted out of engagement,the keys 17 disengaged, conduit section 14 removed and the door opened.i

I claim, in an automatic stoker: 1. The combination with a fire box of abase frame: an engine mounted thereon: a-

frame deta chably secured to the base frame: a feed screw mounted in thedetachable frame and adapted to be driven by connections with theengine, a suitable casing for the feed screw being provided, partly inthe base frame and partly in the detachable frame; a hopper carried bythe detachable frame: and a separable conduit leading from the feedscrew casing and adapted to deliver fuel to the fire box.

2.The combination with a fire box of a base frame: an engine mountedthereon: a frame detachably secured to the base frame: a feed screwmounted in the detachable frame and adapted to be driven by connectionswith the engine, asuitable casing for the feed screw being provided,partly in the base frame and partly in the detachable frame: a hoppercarried by the detachable frame: a fuel door: a feed chute therein: aconduit section fixed to the detachable frame and adapted to receivefuel from the conveyer: and a removable conduit section seated thereon,adapted to receive fuel therefrom and deliver it to the feed chute, anddetachably connected with the door.

3. The combination with a fire box ofa base frame: an engine mountedthereon: a frame detachably secured to the base frame: a feed screwmounted in the detachable frame and adapted to be driven by 'connectionswith the engine, a suitable casing for the feed screw being provided,partly in the I frame detachably secured to the base frame: separableconduit leading from the feed the feed screw being provided, partly inthe a feed screw mounted in the detachable screw casing to the feedchute: and means 10 frame and adapted to be driven by connecfor closingthe feed chute. tions with the engine, a suitable casing for WILLIAM T.HANNA.

base frame and partly in the detachable Witnesses: frame: a hoppercarried by the detachable k CARL PHARES, frame: a fuel door: a feedchute thereinra S. E. RISURENT.

